激光近净成形Ni-Cu-Sn合金  

Laser Engineered Net Shaping of Ni-Cu-Sn Alloys

作　　者：费群星[1] 张雁[1] 谭永生[1] 赵靖[2] 曹文斌[2] 

机构地区：[1]北京航空制造工程研究所,北京100024 [2]北京科技大学,北京100083

出　　处：《稀有金属材料与工程》2007年第11期2052-2056,共5页Rare Metal Materials and Engineering

基　　金：高能束流加工技术国防科技重点实验室06基金资助

摘　　要：利用激光近净成形技术成形出无变形的Ni-Cu-Sn合金样品。沿沉积方向显微组织主要为柱状晶,呈外延式跨层生长,长度随工艺参数不同而变化。平均显微硬度HV0.2在1700MPa左右,而弹性模量和延伸率波动较大,这与高功率下近净成形颗粒全熔化的凝固特性有关。Ni-Cu-Sn alloys are formed by Laser Engineered Net Shaping （LENS） and no apparent deformation can be found in this study. The microstructure of Ni-Cu-Sn alloys is mainly made up of columnar grains crossing several layers with epitaxial growth. The lengths of columnar grains varied with the processing variables. The average microhardness HV0.2 of the as-formed samples is about 1700 MPa. The Young＇s modulus and elongation percentage fluctuate in a wide scale mainly due to the rapid solidification characteristics of Ni-Cu-Sn alloys sintered at high laser power.

关 键 词：激光近净成形 Ni-Cu-Sn合金 显微组织 显微硬度 

分 类 号：TG146.15[一般工业技术—材料科学与工程]